6. Four mark example problems II

A gardener walks around a circular park of distance $154 \ m$. If he wants to level the park at the rate of $₹25$ per $sq. \ m$, how much amount will he need? (Use $\pi = \frac{22}{7}$).

 

Answer:

 

Area of the park $=$  $m^2$

 

Cost of levelling the park $= ₹$